Case C-644/20: Judgment of the Court (Fourth Chamber) of 12 May 2022 (request for a preliminary ruling from the Sąd Okręgowy w Poznaniu — Poland) — W.J. v L.J. and J.J., legally represented by A.P. (Reference for a preliminary ruling — Judicial cooperation in civil matters — Jurisdiction, applicable law, recognition and enforcement of decisions in matters relating to maintenance obligations — Determination of the applicable law — Hague Protocol on the Law Applicable to Maintenance Obligations — Article 3 — Habitual residence of the creditor — Point in time when habitual residence is to be determined — Wrongful retention of a child)